pub fn update_copy(class: &Compatibility, version: &str) -> UpdateCopyExpand description
Word an available version for a person, given how it relates to the running
build (Compatibility). Pure — the same inputs always yield the same
UpdateCopy, with no I/O.
A hot or warm update carries APPLY_NOW; a cold or incompatible one
carries no apply verb and its detail routes to a coordinated deploy instead.